Machinery for manufacturing tube-bends.



No. 697,604. Patented Apr. I'5, |902.

J. BRADLEY. v

MACHINERY FDRMANUFACTURING TUBEr BENDS.

(Application led Aug. 29, 1901.) l

6 Shqets-Sheet I.

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I I. BRADLEY. I MGIIINERY FUR MANUFACTURING TUBE BNDS.

(Application led Aug. 29, 1901.) (No Model.) G'Sheets-Sheet 2.

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J. BRADLEY. MACHINERY FOB MANUFACTURING TUBE BENDAS.

' (Application l'ed Aug. 29, 1901.)

6 Sheets-Sheet 3.

(No Model.)

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No. 697,604. Patented lApr. I5, |902.

J. BRADLEY.

MUAGHINEBY FUR MANUFACTURING TUBE BENDS.

(Appliution tiled Aug. 99, 1901.)

No. 697,604. v Patented Apr. l5, 1902.

J. BRADLEY. A lAcHlNERY' vFOF MANUFACTURING TUBE' BENDS.

(Application led Aug. 29, 1901.)

6 Sheets-Sheet 5.

:(No Model.)

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No. 697,604. n Patented Apr. l5, |902.

J. BRADLEY. v

MACHINERY -FOR MANUFACTURING TU'BE BENDS.

(Application mea Aug. 29, 1901.) (No Model.) .6 Sheets-Sheet 6.

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UNITED STATES PATENT OFFICE.

JOHN BRADLEY, OF BIRMINGHAM, ENGLAND.

MACHINERYOFOR MANUFACTURING TUBE-BENDS.

SPECIFICATION forming part of Letters Patent No. 697,604, dated April 15, 1902. Y

Application tiled August 29. 1901.

To all whom 1125 may concern:

Be it known that I, JOHN BRADLEY, a subject of the King of Great Britain, and a resident of Birmingham, England, have invented certain new and useful Improvements in Machinery for Manufacturing Tubes, of which the following is a specification. I

My invention has for its object improvements in machinery for manufacturing tubebends by which I am enabled to form any number of bends all of one uniform and accurate angle in a cheap and simple manner, thus enabling both ends of each bend to be automatically screwed or tapped smulta neously without having to alter or reset the dies for each bend. My machine is specially applicable for forming bends from tubing of a large diameter, but can with equal advantage be used for bends madefrom small-diameter tubing. I Y

In order that my invention may be clearly understood and more easily carried into practical effect, I have illustrated it in the accompanying drawings, in which- 5o on a stud supported by the bracket E.

Figure 1 is a front elevation of my machine for forming bends, showinga length of tubing in position ready for being bent. Fig. 2 is a plan view of Fig. 1. Fig. 3 is a left-hand'end view of Fig. 1. Fig. 4 is a right-hand end View of Fig. 1. Fig. 5 is a sectional end elevation taken on theline 1 2 ofFig. 1. Fig. 6 is a front view of my open-ended dog or gripper. EFig. 7 is an end View of Fig. 6. Fig. 8 is a plan view showing a slight modication in the construction of my machine for forming bends. Fig. 9 isan enlarged crosssection view taken on the line 0c @c of Fig.8.V Fig. 10 is a right-hand end elevation of Fig. 8.

In carrying my invention into practice I provide the bed B, along one edge of which is formed the cheek b and on the other edge the stop b2, and at either end are the end supports or sides b3 b4.. Mounted in suitable bearingsV in these supports is the main shaft S, on one end of which is xed the wormwheel NV, gearing with .the worm w', fixed on `the driving-shaft D, and on the other end of the shaft S is xed the gear-wheel 102, gearing with the intermediate gear-wheel e, mounted This bracket E is pivoted'at c2 tothe outer face of the support-b, so as to enable the interme- Serial No. 73,673. (No model.)

diate gear-wheel e to be changed, and this intermediate gear-Wheel also gears with the gear-wheel f', xed on the end of the screwshaft F, mounted in bearings in the supports b3 b4. screwed with al right-hand thread and the Vother portion with the left-hand thread f3,

as clearly shown at Figs. 1 and 2. Fixedon the opposite end of the ,screw-shaft F is the gear-wheel f4, gearing vwith the gear-wheel4 h', fixed on the end of the screw-shaft H, also mounted in bearings'in thek supports b3 b4, and the portion h2 of this shaftH is screwed with a left-hand thread and the portion h3 with a right-hand thread. Mounted on the bed B and held in position by the loose cheek b5 are the traveling carriers J and K, through which the'screw-shafts F and H pass, and in sockets formed in these carriers I lit the dogs or grippers M and N upon their supports or carriers m n', respectively. These dogs or` grippers are capable of being turned or operated in their sockets by the worms s' 32,1nounted'upon the shaft S, which worms gear with the quadrants L L', fixed upon the supports., or pivots m and In,-which said quadrants work in the slots or openings formed in the carriers J and K. The worms s and s2 are mounted upon the shaft Svinrthe feather-Way s3, so as to be capable of slidingvthereon, and

The one portion f2 of the shaft F is,

the loose pulleys dandd, withthefixed pul- Vley di between, are mounted 'upon the driving-shaftl) for-imparting motion to the machine. .By changingthe intermediate gear- H can be altered, thus enabling the speed of lwheel e' the'speed of the screw-shafts F and the carriers J and Kv to be altered for making bends of various radii.

The length of tubing T before being inserted in the machine is first filled with sand and the ends with marlv or clay and then heated to the required temperature.

It will easily be understood that if motion is imparted to the driving-shaft Ditwill be transmitted through the various gearing to the main shaft S and from thence toy thescrew-shafts F and H. Now supposing the dogs and length of tubing T to be in the position asshown upon the drawings ready for bending and the driving-shaft revolving in the direction of the arrow the carriers J and K would then advance or close together,

ICO

and as the dogs advance with them they would gradually turn on their pivots by the action of the worms s' and s2, which revolve with the shaft S and are in gear with the quadrants L and L', respectively. By this means the length of tubing would be easily and readilybent to the required angle. The machine is now stopped and -the bend removed, the open and crossed driving-belts, which drive the machine, now being situated upon the inner half or side of the loose pulleys d' d2. To move the carriers and dogs back to their former positions ready fol` inserting another' length of tubing, the crossed driving-belt on the loose pulley d2 is moved by the belt-fork onto the fixed pulley d3, and the open belt is simultaneously removed onto the outer half or side of the loose pulley CZ', thus reversing the motion of the shafts S, F, and H, and consequently the movements of the carriers and dogs.

At Figs. 6 and 7 I have shown my openended dogs suitable for holding a long length of tubing which requires to be bent at a certain portion of its length. In this case the upper portion of the dog is hinged to the lower portion, thus enabling the tube to be laid in position.

At Figs. S, 9, and 10 I have shown a slight modification in the construction and gearing mechanism of my machine for forming bends. In this case I drive direct onto the main shaft S, and on the end of this shaft I mount the gear-wheel wg, gearing with the intermediate gear-Wheel e', fixed on the shaft e3, supported by the bracket E. Fixed on the opposite end of this shaft e3 is the worm e4, gearing with the worm-wheel e5, mounted on a stud supported by the boss e, fixed to or forming part of the bracket E. Also mounted on the same stud as the worm-wheel e5 is the pinion-wheel e7, gearing with the gear-Wheel e8, fixed on the shaft e", supported by the bracket ew, and on the opposite end of this shaft eg is fixed the gear-wheel en, gearing with the gear-Wheels @mand @13, fixed on the ends of the screw-shafts F and H, respectively, by which means motion is imparted to these shafts, each shaft being screw-threaded at the right hand with -a right-hand thread and at the lefthand with a left-hand thread. The gear-wheels c and @15 on the opposite ends of these screw-shafts,

which gear with the intermediate wheel el, are for the purpose of enabling the screwshafts to run evenly and steadily. Mounted on the main shaft S in a keyway are the worms s4 35, gearing with the worm-wheels s 37, mounted on the ends of the cross-shafts S8 s, mounted in bearings supported by the carriers J and K, and on these cross-shafts are fixed the Worms s s2, which gear with the quadrants or segments L L. It will thus be seen that by this arrangement the dogs or grippers, which are supported by their carriers, are caused to travel toward each other and at the same time turn or revolve.

What I claim, then, is-

1. The improvements in machinery for manufacturing tube-bends consisting essentially of two carriers capable of traveling in reverse directions,a dog or gripper pivotally mounted in each carrier with means for operating or moving the dogs upon their pivots in the manner and for the purpose substantially as herein set forth.

2. In machines for making tube-bends, a pair of carriers capable of travelingin reverse directions, a dog or gripper pivotally mounted in each carrier, and quadrants and worms for operating said dogs, substantially as described.

3. In machines for bending tubes, a pair of carriers, dogs or grippers mounted therein, and means for simultaneously moving said dogs or grippers and carriers, substantially as described.

4. In machines for bending tubes, a pair of traveling carriers, dogs or grippers having quadrants and pivotally mounted in said carriers, an operating-shaft, worms keyed to said shaft and engaging the quadrants, and screwshafts for operating said carriers in reverse directions, substantially as described.

In witness whereof I have hereunto set my hand in presence of two Witnesses.

JOHN BRADLEY.

Witnesses: l

I-I. W. DENToN INGHAM, H. C. GRUNDY.. 

